19754134134 has 16 divisors (see below), whose sum is σ = 45152306688. Its totient is φ = 5644038312.

The previous prime is 19754134133. The next prime is 19754134139. The reversal of 19754134134 is 43143145791.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 470336527 = 19754134134 / (1 + 9 + 7 + 5 + 4 + 1 + 3 + 4 + 1 + 3 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19754134133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235168222 + ... + 235168305.

It is an arithmetic number, because the mean of its divisors is an integer number (2822019168).

Almost surely, 2^19754134134 is an apocalyptic number.

19754134134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19754134134 is an abundant number, since it is smaller than the sum of its proper divisors (25398172554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19754134134 is a wasteful number, since it uses less digits than its factorization.

19754134134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470336539.

The product of its digits is 181440, while the sum is 42.

The spelling of 19754134134 in words is "nineteen billion, seven hundred fifty-four million, one hundred thirty-four thousand, one hundred thirty-four".